JP2016021666A - Mobile terminal device, sound reproduction method, and sound reproduction program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress consumption power.SOLUTION: A mobile terminal device comprises: a first processor which executes processing for an application; and a second processor which executes monitoring processing for monitoring a control state of radio communication in a predetermined interval. The first processor requests the second processor to execute transfer processing, when not executing other processing than the transfer processing for transferring to a reproduction processing section which reads reproduction sound data from a predetermined storage section to reproduce the sound. The second processor synchronizes the transfer processing requested from the first processor together with the monitoring processing to execute it.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a mobile terminal device, an audio reproduction method, and an audio reproduction program.

  In recent years, mobile terminals are used for applications that perform processing of display functions, touch key input, audio playback, and other multimedia functions, in addition to processors for wireless processing that perform basic functions such as communication and telephone calls. It is common to install the processor.

  The application processor reads and reproduces audio data from an external storage medium or the like. However, the capacity of the internal memory of the mobile terminal and the data buffer for the codec is limited, so that data for one song is read and stored. I can't let you. For this reason, the application processor reads audio reproduction data periodically and transfers it to a codec data buffer or the like, thereby reproducing the audio without interruption.

JP 2007-88787 A

  However, the processor for the application similarly enters the sleep state and stops when the portable terminal transits to the sleep state. However, during the period when the audio is being reproduced, the processor for the application is periodically activated to transfer the reproduction data of the audio. . That is, when the portable terminal is in the sleep state, the application processor repeatedly starts and stops, so that power consumption is large.

  An object of one aspect is to provide a mobile terminal device, an audio reproduction method, and an audio reproduction program that can reduce power consumption.

  In the first plan, the mobile terminal device includes a first processor that executes processing relating to an application, and a second processor that executes monitoring processing for monitoring a control state of wireless communication at predetermined intervals. When the first processor does not execute any other process other than the transfer process of reading audio reproduction data from a predetermined storage unit and transferring it to a reproduction processing unit for reproducing the audio, the first processor executes the transfer process. Request to second processor. The second processor executes the transfer process requested by the first processor in synchronization with the monitoring process.

  According to one embodiment, power consumption can be suppressed.

FIG. 1 is a diagram illustrating the mobile terminal device according to the first embodiment. FIG. 2 is a diagram illustrating a hardware configuration example of the mobile terminal device. FIG. 3 is a diagram for explaining data transfer. FIG. 4 is a diagram illustrating state transition. FIG. 5 is a flowchart showing the flow of processing executed by the ACPU. FIG. 6 is a flowchart showing a flow of processing executed by the CCPU. FIG. 7 is a processing sequence diagram showing a transition from state 1 to state 2. FIG. 8 is a processing sequence diagram showing a transition from state 2 to state 1. FIG. 9 is a diagram for explaining conventional power consumption. FIG. 10 is a diagram illustrating that power consumption can be reduced.

  Hereinafter, embodiments of a mobile terminal device, an audio reproducing method, and an audio reproducing program disclosed in the present application will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

[Operation of mobile terminal device]
FIG. 1 is a diagram illustrating the mobile terminal device according to the first embodiment. A mobile terminal device 10 shown in FIG. 1 is a wireless communication device having a first processor that executes processing related to an application and a second processor that executes processing related to wireless communication, and is, for example, a smartphone or a mobile phone. .

  Hereinafter, the first processor may be described as an ACPU (Application Central Processing Unit), and the second processor may be described as a CCPU (Communication Central Processing Unit).

  For example, the ACPU executes applications such as reproduction of audio reproduction files such as music, games, and mail. The CCPU executes processing related to wireless communication such as outgoing / incoming processing, voice call, and data communication. In addition, the CCPU executes a monitoring process for monitoring the control state of the wireless communication at a predetermined interval in a standby state where the call process and the data communication are not performed. For example, when the mobile terminal device 10 is in a sleep state, the CCPU performs an operation for periodically monitoring the presence / absence of an incoming call, radio wave status, and the like (hereinafter sometimes referred to as a wireless intermittent cycle operation).

  As shown in FIG. 1, in the portable terminal device 10, when music playback is instructed by a user operation in a sleep state where the CCPU is regularly monitored, the ACPU reads music playback data from an external memory and plays music. Transfer to codec section to play. In this way, the mobile terminal device 10 performs music playback.

  Then, when the ACPU is not executing any process other than the transfer process for transferring the music reproduction data, the ACPU requests the CCPU to execute the transfer process, and the CCPU performs the transfer process requested from the ACPU by the wireless intermittent period. Execute in synchronization with the operation. When the CCPU starts executing the transfer process, the ACPU shifts to the sleep state, and the mobile terminal device 10 shifts to the sleep state. On the other hand, when the ACPU is executing a process other than the reproduction data transfer process, the ACPU periodically executes the transfer process.

  As described above, when the mobile terminal device 10 is in a sleep state in which the ACPU process is not other than the music data transfer, the CCPU synchronizes with the process of periodically monitoring the wireless state and executes the music data transfer on behalf of the ACPU. To do. That is, when there is no processing task of the ACPU other than the music transfer task, the music transfer task of the ACPU is transferred to the CCPU. As a result, power consumption can be suppressed. In addition, although a music is illustrated as an aspect of a sound in a present Example, it is not limited to this. That is, as long as it is a recorded sound, it may be a human voice, a natural sound, a ringtone, an alarm sound, or the like.

[Configuration of mobile terminal device]
FIG. 2 is a diagram illustrating a hardware configuration example of the mobile terminal device. As shown in FIG. 2, the mobile terminal device 10 includes an external memory 11, a CCPU 12, an RF (Radio Frequency) unit 13, a power management unit 14, an ACPU 15, a shared memory 16, a buffer 17, a DSP (Digital Signal Processor) 18, and a conversion. Part 19 and output part 20. Note that the hardware shown here is merely an example, and for example, a touch panel or a hard disk may be included in addition to the illustrated one.

  The external memory 11 is a storage device that stores a reproduction file of sound such as music, and is, for example, a memory stick or an SD card. In this embodiment, an example in which a playback file is stored in the external memory will be described. However, the present invention is not limited to this, and the playback file stored in the memory or the like in the mobile terminal device 10 is similarly applied. Can be processed.

  The CCPU 12 is an example of a processor that executes processing related to wireless communication. Specifically, the CCPU 12 performs overall processing relating to wireless communication such as baseband processing, incoming processing and outgoing processing, control information reception processing from the base station, control information transmission processing to the base station, and handover control. Execute.

  In addition, when the mobile terminal device 10 is in the sleep state, the CCPU 12 executes a wireless intermittent cycle operation that periodically monitors the presence / absence of an incoming call, radio wave conditions, and the like. At this time, when the transfer process of the reproduction data is transferred from the ACPU 15, the CCPU 12 executes the transfer process of the reproduction data in synchronization with the wireless intermittent operation. Further, the CCPU 12 causes the ACPU 15 to transfer the reproduction data transfer process when a wireless process such as an incoming call occurs while the reproduction data transfer process is transferred. Details of the reproduction data transfer process will be described later.

  The RF unit 13 transmits and receives data via the antenna 13a. The power management unit 14 manages the power supply of the mobile terminal device 10. Specifically, the power management unit 14 can execute power management for each hardware. For example, when the ACPU 15 is not executing any processing and is in a sleep state, the power management unit 14 suppresses power supply to the ACPU 15.

  The power management unit 14 resumes power supply to the ACPU 15 when an application or the like is started in a state where the power supply to the ACPU 15 is stopped. For example, when the touch panel or the like accepts an application activation instruction or the touch panel or the like accepts an instruction to play or stop music, the power management unit 14 resumes power supply to the ACPU 15.

  The ACPU 15 is an example of a processor that executes processing related to an application. For example, the ACPU 15 executes reproduction data transfer processing during reproduction of an audio reproduction file such as music. Note that the flow of reproduction data transferred here is the same as that executed by the CCPU 12.

  For example, the ACPU 15 reads a predetermined number of reproduction data from the external memory 11 and stores it in the shared memory 16. Thereafter, the ACPU 15 reads the reproduction data from the shared memory 16 and transfers it to the buffer 17 at a predetermined interval such as an interval of 5 seconds. At this time, the amount of data transferred from the external memory 11 to the shared memory 16 dynamically changes depending on the free capacity of the shared memory 16. Similarly, the amount of data transferred from the shared memory 16 to the buffer 17 is the free space of the buffer 17. It changes dynamically depending on the capacity.

  The ACPU 15 transfers the transfer process to the CCPU 12 when no process other than the reproduction data transfer process is executed, that is, when there is no task other than the transfer process. At this time, the ACPU 15 stores in the shared memory 16 reproduction management information indicating how far reproduction data transfer has been completed. Then, the ACPU 15 notifies the power management unit 14 that there is no task, transitions to the sleep state, and requests suppression of power supply.

  In addition, when the power supply is stopped in the sleep state, the ACPU 15 performs transfer performed by the CCPU 12 when the power supply is resumed from the power management unit 14 and released from the sleep state in response to detection of a user operation or the like. The processing is stopped and execution of the transfer processing is started. That is, the ACPU 15 transfers the transfer process from the CCPU 12 with the restart of the power supply, and resumes the transfer of the reproduction data according to the reproduction management information stored in the shared memory 16 by the CCPU 12. For example, when the reproduction management information is 4, the ACPU 15 reads the fifth reproduction data from the shared memory 16 and transfers it to the buffer 17.

  The shared memory 16 is a shared storage device that can be accessed from the CCPU 12 and the ACPU 15, and temporarily stores the reproduction data transferred from the external memory 11. The shared memory 16 stores reproduction management information stored by any CPU. This reproduction management information includes the next read pointer of the external memory 11, the next read pointer of the shared memory 16, the remaining data information of the shared memory 16, and the like.

  The buffer 17 is a storage device that stores reproduction data, and stores reproduction data read by the DSP 18 described later. The DSP 18 reads the reproduction data from the buffer 17, executes decoding processing, and outputs it to the conversion unit 19.

  The conversion unit 19 converts the decoded reproduction data from a digital signal to an analog signal and outputs the converted signal to the output unit 20. The output unit 20 is an output device that outputs the audio signal input from the conversion unit 19, and is, for example, a speaker or an earphone.

[Example of data transfer]
FIG. 3 is a diagram for explaining data transfer. Here, as an example, an example in which the ACPU 15 executes the transfer process will be described. Note that the reproduction data transfer process from the external memory 11 to the shared memory 16 and the reproduction data transfer process from the shared memory 16 to the buffer 17 described here correspond to the transfer process described in the embodiment.

  As shown in FIG. 3, the external memory 11 stores an audio file (n is an arbitrary natural number) composed of reproduction data 1 to reproduction data n. In this state, when the ACPU 15 starts the audio reproduction application, the ACPU 15 reads out the number of data (four data in FIG. 3) corresponding to the availability of the shared memory 16 from the external memory 11 and stores it in the shared memory 16. At this time, the ACPU 15 stores information indicating that the reproduction data 4 has been read from the external memory 11 in the reproduction management information. After that, the ACPU 15 transfers several pieces of reproduction data from the external memory 11 to the shared memory 16 according to the availability of the shared memory 16.

  Thereafter, the ACPU 15 confirms the availability of the buffer 17 when a predetermined period or the remaining capacity of the buffer 17 becomes equal to or less than a certain value, and the number of pieces of reproduction data corresponding to the confirmed availability is shared memory 16. Is stored in the buffer 17. Then, the ACPU 15 stores information specifying the last reproduction data that has been transferred from the shared memory 16 to the buffer 17 in the reproduction management information.

[State transition]
Next, the state transition regarding the music reproduction of the portable terminal device 10 will be described. FIG. 4 is a diagram illustrating state transition. As shown in FIG. 4, in the state 0, the mobile terminal device 10 is in a music reproduction stop state. When a music playback instruction is received from this state 0, the mobile terminal device 10 transitions to state 1.

  State 1 is a state in which music is being played back, and the ACPU 15 executes a process for transferring music playback data. From this state 1, when there is no task executed by the ACPU 15 other than the transfer process, the mobile terminal device 10 transitions to the state 2. Further, from this state 1, when the music reproduction is finished, the mobile terminal device 10 transits to the state 0.

  State 2 is a state in which music is being played back, and the CCPU 12 executes playback data transfer processing that is executed in synchronization with the wireless intermittent operation. From this state 2, when another task executed by the ACPU 15 occurs or when the CCPU 12 starts processing such as a call, the mobile terminal device 10 transitions to the state 1.

[ACPU processing]
FIG. 5 is a flowchart showing the flow of processing executed by the ACPU. As shown in FIG. 5, when the ACPU 15 receives an audio playback operation (S101: Yes), the ACPU 15 starts an audio playback process (S102).

  When there is another process other than the audio playback process (S103: Yes), the ACPU 15 executes the transfer process of the audio playback data when the predetermined period is reached (S104), and manages the transferred information. The buffer information is updated (S105). The buffer information is information for managing information transferred in the ACPU 15, and is managed by an internal memory in the ACPU 15.

  On the other hand, when there is no other process other than the audio playback process (S103: No), the ACPU 15 updates the playback management information in the shared memory 16 with the information of the buffer information (S106). Then, the ACPU 15 notifies the CCPU 12 of transfer of reproduction data transfer processing (S107), and transitions to the sleep state (S108).

  Thereafter, when the ACPU 15 receives a transfer process execution request from the CCPU 12 or starts execution of another process related to an application other than the audio playback application (S109: Yes), the ACPU 15 acquires the playback management information of the shared memory 16 (S110). ).

  When the ACPU 15 reaches a predetermined cycle, the ACPU 15 executes reproduction data transfer processing according to the acquired reproduction management information (S111).

[CCPU processing]
FIG. 6 is a flowchart showing a flow of processing executed by the CCPU. As shown in FIG. 6, when the CCPU 12 receives a reproduction data transfer processing execution request from the ACPU 15, that is, when transfer processing transfer is executed (S <b> 201: Yes), whether or not the wireless intermittent cycle operation is possible is determined. Determine (S202). Specifically, the CCPU 12 determines whether processing such as wireless communication such as call processing has occurred.

  When the wireless intermittent operation is impossible (S202: No), the CCPU 12 notifies the ACPU 15 that the reproduction data transfer process cannot be executed (S203).

  On the other hand, when the wireless intermittent operation is possible (S202: Yes), the CCPU 12 acquires the reproduction management information of the shared memory 16 (S204), and executes reproduction data transfer processing according to the acquired reproduction management information (S204). S205). Thereafter, the CCPU 12 updates the buffer information in the CCPU 12 that manages the information transferred in the CCPU 12 (S206).

  Thereafter, when processing such as wireless communication occurs (S207: Yes), the CCPU 12 updates the reproduction management information of the shared memory 16 with the information of the buffer information (S208), and notifies the ACPU 15 of transfer processing transfer (S209). ). Then, the CCPU 12 executes the generated wireless communication or the like (S210).

[Processing sequence]
Next, the processing sequence from state 1 to state 2 and the processing sequence from state 2 to state 1 shown in FIG. 4 will be described.

(Sequence 1)
FIG. 7 is a processing sequence diagram showing a transition from state 1 to state 2. As shown in FIG. 7, music is being played back in the mobile terminal device 10 (S301), the ACPU 15 is executing a retransmission data transfer process (S302), and the CCPU 12 is executing a wireless intermittent cycle operation. Yes (S303).

  In such a state, when the ACPU 15 detects that there is no other process other than the transfer process (S304), it transmits a process transfer inquiry to the CCPU 12 (S305 and S306).

  Upon receiving this inquiry, the CCPU 12 transmits a process transfer enable notification to the ACPU 15 (S307 and S308), and the ACPU 15 updates the reproduction management information in the shared memory 16 (S309 and S310).

  Thereafter, the ACPU 15 requests the CCPU 12 to execute the transfer process (S311 and S312), and the CCPU 12 recognizes the transfer of the process (S313). Then, the CCPU 12 acquires the reproduction management information of the shared memory 16 (S314 and S315).

  Subsequently, the CCPU 12 transmits a transfer processing transfer completion notification to the ACPU 15 (S316 and S317). Then, the ACPU 15 stops the control and shifts to the sleep state (S318). Further, the CCPU 12 executes reproduction data transfer in synchronization with the wireless intermittent operation (S319). In this way, the mobile terminal device 10 continues to play music (S320).

(Sequence 2)
FIG. 8 is a processing sequence diagram showing a transition from state 2 to state 1. As shown in FIG. 8, music is being played back in the mobile terminal device 10 (S401), the ACPU 15 is in a sleep state (S402), and the CCPU 12 performs playback data transfer processing in synchronization with the wireless intermittent cycle operation. Is being executed (S403).

  In such a state, when wireless communication occurs (S404), the CCPU 12 activates the ACPU 15 via the power management unit 14 (S405 to S407), and transmits a process transfer inquiry to the ACPU 15 (S408 and S409). .

  Upon receiving this inquiry, the ACPU 15 transmits a process transfer enable notification to the CCPU 12 (S410 and S411), and the CCPU 12 updates the reproduction management information in the shared memory 16 (S412 and S413).

  Thereafter, the CCPU 12 requests the ACPU 15 to execute the transfer process (S414 and S415), and executes the generated wireless communication (S416). On the other hand, when the ACPU 15 recognizes the transfer of processing (S417), it acquires the reproduction management information of the shared memory 16 (S418 and S419).

  Subsequently, the ACPU 15 transmits a transfer process transfer completion notification to the CCPU 12 (S420 and S421). Thereafter, the ACPU 15 executes reproduction data transfer (S422). In this way, the mobile terminal device 10 continues to play music (S423).

  Note that although the above-described flowcharts and sequence diagrams describe an example in which one transfer process is executed, this is simplified for the sake of explanation, and the above process is normally executed repeatedly. Each CPU repeatedly executes the transfer process periodically. For this reason, when there is no task before the next transfer process is executed, the ACPU 15 transfers the process to the CCPU 12, and the CCPU 12 executes the process from the next transfer process. Similarly, when wireless communication or the like occurs before the next transfer process is executed, the CCPU 12 transfers the process to the ACPU 15, and the ACPU 15 executes the process from the next transfer process.

[effect]
FIG. 9 is a diagram for explaining conventional power consumption. As shown in FIG. 9, the intermittent cycle of the wireless intermittent cycle operation normally performed by the CCPU 12 and the transfer cycle of the reproduction data transfer performed by the ACUP 15 are asynchronous. Note that the intermittent period is shorter than the transfer period. For example, the intermittent period is, for example, 2.5 seconds, and the transfer period is, for example, 4 seconds. Therefore, the power consumption is the sum of the power consumption of the CCPU 12 for the monitoring process for each intermittent period and the power consumption of the ACPU 15 for the transfer process for each transfer period.

  On the other hand, FIG. 10 is a diagram illustrating that power consumption can be reduced. FIG. 10 shows that the power consumption can be reduced by the CCPU 12 executing the transfer process. Specifically, the intermittent cycle of the CCPU 12 and the transfer cycle of the ACUP 15 are usually asynchronous, but in FIG. 10, the CCPU 12 executes the transfer process in synchronization with the intermittent cycle. Therefore, the power consumption is only the power consumption of the CCPU 12 for the monitoring process and the transfer process for each intermittent period. That is, since the start / stop of the transfer process of the ACPU 15 that consumes the most power can be suppressed, the above-described method can reduce the power consumption compared to the conventional method.

  In addition, since the CCPU 12 performs data transfer for audio reproduction in synchronization with its own processing, the ACPU 15 can be stopped during a period in which application control has conventionally been necessary, thereby realizing low power consumption. Further, conventional processing is possible depending on the state, and an optimum method can be selected in consideration of the performance of each CPU.

  In addition, when the CCPU 12 executes communication processing such as call processing or out-of-service processing that periodically detects the radio wave because the radio wave is out of service, the transfer processing of the reproduction data is transferred to the ACPU 15 again. It is possible to suppress the occurrence of processing delays and music playback abnormalities. Even if the process is transferred to the CCPU 15 and the ACPU 15 is stopped, the ACPU 15 is started when a stop, fast-forward, rewind, another music playback instruction, activation of another application, or the like occurs. For this reason, the ACPU 15 can execute the requested processing without delay.

  Although the embodiments of the present invention have been described so far, the present invention may be implemented in various different forms other than the embodiments described above.

[When to re-transfer]
In the above embodiment, when the ACPU 15 is requested to execute another application process during the transfer process transfer to the CCPU 12, the process is transferred to the ACPU 15 again. However, the present invention is not limited to this. For example, the ACPU 15 can request the CCPU 12 to transfer the processing when processing of another application is continuously generated for a certain period of time. By doing in this way, frequent occurrence of process transfer can be suppressed, and an increase in delay and load due to frequent occurrence of process transfer can be suppressed.

[system]
Further, each configuration of the illustrated apparatus does not necessarily need to be physically configured as illustrated. That is, it can be configured to be distributed or integrated in arbitrary units. Further, all or any part of each processing function performed in each device may be realized by a CPU and a program analyzed and executed by the CPU, or may be realized as hardware by wired logic.

  In addition, among the processes described in this embodiment, all or part of the processes described as being performed automatically can be performed manually, or the processes described as being performed manually can be performed. All or a part can be automatically performed by a known method. In addition, the processing procedure, control procedure, specific name, and information including various data and parameters shown in the above-described document and drawings can be arbitrarily changed unless otherwise specified.

  Note that the mobile terminal device 10 described in the present embodiment can execute the same function as the processing described in the above embodiment by reading and executing the audio reproduction program. For example, the mobile terminal device 10 can execute processes similar to the various processes described in the flowcharts and sequence diagrams described above by expanding and executing a sound reproduction program in a memory.

  This program can be distributed via a network such as the Internet. The program can be executed by being recorded on a computer-readable recording medium such as a hard disk, a flexible disk (FD), a CD-ROM, an MO, and a DVD, and being read from the recording medium by the computer.

10 mobile terminal device 11 external memory 12 CCPU
13 RF unit 13a Antenna 14 Power management unit 15 ACPU
16 shared memory 17 buffer 18 DSP
19 Conversion unit 20 Output unit

Claims (8)

A first processor that executes processing relating to an application;
A second processor that executes a monitoring process for monitoring a control state of wireless communication at a predetermined interval;
The first processor is
When no other processing is executed other than the transfer processing for reading the audio reproduction data from the predetermined storage unit and transferring it to the reproduction processing unit for reproducing the audio, the second processor is requested to execute the transfer processing. ,
The second processor is
The portable terminal device, wherein the transfer process requested by the first processor is executed in synchronization with the monitoring process.   The mobile terminal device according to claim 1, further comprising a power management unit that suppresses power supply to the first processor when the execution of the transfer process is started by the second processor. When the second processor starts executing out-of-service processing or call processing, the second processor requests the first processor to execute the transfer processing;
The portable terminal device according to claim 1, wherein the first processor executes the transfer process requested by the second processor at a predetermined cycle.   When the user operation related to the voice or the user operation related to the wireless communication is executed, the first processor stops the transfer process by the second processor and executes the transfer process at a predetermined cycle. The mobile terminal device according to claim 1.   The first processor, when processing other than the transfer processing is continuously executed for a predetermined time, stops the transfer processing by the second processor and executes the transfer processing at a predetermined cycle. The mobile terminal device according to claim 1.   2. The second processor, wherein the reproduction data having a capacity corresponding to a free capacity of a buffer included in the reproduction processing unit is read from the predetermined storage unit and transferred to the reproduction processing unit. The mobile terminal device according to 1. In a portable terminal device having a first processor that executes processing related to an application and a second processor that executes monitoring processing for monitoring a control state of wireless communication at a predetermined interval,
The first processor comprises:
When no other processing is executed other than the transfer processing for reading the audio reproduction data from the predetermined storage unit and transferring it to the reproduction processing unit for reproducing the audio, the second processor is requested to execute the transfer processing. ,
The second processor comprises:
An audio reproduction method comprising: a process of executing the transfer process requested by the first processor in synchronization with the monitoring process. In a portable terminal device having a first processor that executes processing related to an application and a second processor that executes monitoring processing for monitoring a control state of wireless communication at a predetermined interval,
In the first processor,
When no other processing is executed other than the transfer processing for reading the audio reproduction data from the predetermined storage unit and transferring it to the reproduction processing unit for reproducing the audio, the second processor is requested to execute the transfer processing. ,
In the second processor,
An audio reproduction program for executing a process of executing the transfer process requested by the first processor in synchronization with the monitoring process.

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